diff --git a/docs/misc/changelog.rst b/docs/misc/changelog.rst
index 3179605..3895380 100644
--- a/docs/misc/changelog.rst
+++ b/docs/misc/changelog.rst
@@ -4,7 +4,7 @@ Changelog
 ==========
 
 
-Release 1.5.1a3 (WIP)
+Release 1.5.1a4 (WIP)
 ---------------------------
 
 Breaking Changes:
@@ -23,6 +23,7 @@ Bug Fixes:
 ^^^^^^^^^^
 - Fixed saving and loading large policies greater than 2GB (@jkterry1, @ycheng517)
 - Fixed final goal selection strategy that did not sample the final achieved goal (@qgallouedec)
+- Fixed a bug with special characters in the tensorboard log name (@quantitative-technologies)
 
 Deprecations:
 ^^^^^^^^^^^^^
@@ -962,4 +963,4 @@ And all the contributors:
 @wkirgsn @AechPro @CUN-bjy @batu @IljaAvadiev @timokau @kachayev @cleversonahum
 @eleurent @ac-93 @cove9988 @theDebugger811 @hsuehch @Demetrio92 @thomasgubler @IperGiove @ScheiklP
 @simoninithomas @armandpl @manuel-delverme @Gautam-J @gianlucadecola @buoyancy99 @caburu @xy9485
-@Gregwar @ycheng517
+@Gregwar @ycheng517 @quantitative-technologies
diff --git a/stable_baselines3/common/utils.py b/stable_baselines3/common/utils.py
index 8504c8d..94cd658 100644
--- a/stable_baselines3/common/utils.py
+++ b/stable_baselines3/common/utils.py
@@ -154,15 +154,18 @@ def get_device(device: Union[th.device, str] = "auto") -> th.device:
     return device
 
 
-def get_latest_run_id(log_path: Optional[str] = None, log_name: str = "") -> int:
+def get_latest_run_id(log_path: str = "", log_name: str = "") -> int:
     """
     Returns the latest run number for the given log name and log path,
     by finding the greatest number in the directories.
 
+    :param log_path: Path to the log folder containing several runs.
+    :param log_name: Name of the experiment. Each run is stored
+        in a folder named ``log_name_1``, ``log_name_2``, ...
     :return: latest run number
     """
     max_run_id = 0
-    for path in glob.glob(f"{log_path}/{log_name}_[0-9]*"):
+    for path in glob.glob(os.path.join(log_path, f"{glob.escape(log_name)}_[0-9]*")):
         file_name = path.split(os.sep)[-1]
         ext = file_name.split("_")[-1]
         if log_name == "_".join(file_name.split("_")[:-1]) and ext.isdigit() and int(ext) > max_run_id:
diff --git a/stable_baselines3/version.txt b/stable_baselines3/version.txt
index 8d61b2f..d6a9f8c 100644
--- a/stable_baselines3/version.txt
+++ b/stable_baselines3/version.txt
@@ -1 +1 @@
-1.5.1a3
+1.5.1a4
diff --git a/tests/test_tensorboard.py b/tests/test_tensorboard.py
index 20f58b9..6dccf41 100644
--- a/tests/test_tensorboard.py
+++ b/tests/test_tensorboard.py
@@ -3,6 +3,7 @@ import os
 import pytest
 
 from stable_baselines3 import A2C, PPO, SAC, TD3
+from stable_baselines3.common.utils import get_latest_run_id
 
 MODEL_DICT = {
     "a2c": (A2C, "CartPole-v1"),
@@ -35,3 +36,13 @@ def test_tensorboard(tmp_path, model_name):
     assert os.path.isdir(tmp_path / str(logname + "_1"))
     # Check that the log dir name increments correctly
     assert os.path.isdir(tmp_path / str(logname + "_2"))
+
+
+def test_escape_log_name(tmp_path):
+    # Log name that must be escaped
+    log_name = "filename[16, 16]"
+    # Create folder
+    os.makedirs(str(tmp_path) + f"/{log_name}_1", exist_ok=True)
+    os.makedirs(str(tmp_path) + f"/{log_name}_2", exist_ok=True)
+    last_run_id = get_latest_run_id(tmp_path, log_name)
+    assert last_run_id == 2